Support for the Apple WatchOS is now available in the most recent Aithre Connect Apple iOS update. The WatchOS is a companion app to the Aithre Connect iOS app, meaning that WatchOS support comes automatically when you download the Aithre Connect iOS app. The WatchOS app obtains carbon monoxide ppm, pilot SPO2 and heart rate, portable oxygen tank pressure/flow rate/time remaining, and provides cabin pressure altitude. The data is automatically collected and presented in a convenient and easy access interface. The Apple Watch provides wrist taps when SPO2 is under 90 percent and when CO ppm rises above 50ppm.